Scilab Function
Last update : April 1993

evstr - evaluation of expressions

### Calling Sequence

  `H=evstr(Z)`
  `[H,ierr]=evstr(Z)`

### Parameters

- `Z`: matrix of character strings `M` or `list(M,Subexp)`
  - `M`: matrix of character strings
  - `Subexp`: vector of character strings
- `H`: matrix
- `ierr`: integer, error indicator

### Description

Returns the result of the evaluation of the matrix of character strings `M`. Each element of the matrix must define a valid Scilab expression.

If the evaluation of `M` expression leads to an error, the single return value version, `H=evstr(M)`, raises the error as usual. The two return values version, `[H,ierr]=evstr(M)`, on the other hand, produces no error, but returns the error number in `ierr`.

If `Z` is a list, `Subexp` is a vector of character strings, that defines sub_expressions which are evaluated before evaluating `M`. These sub_expressions must be referred to as `%(k)` in `M`, where `k` is the sub-expression's index in `Subexp`.

evstr('a=1') is not valid (use `execstr` instead).

### Examples

    a=1; b=2; Z=['a','b'] ; evstr(Z)

    a=1; b=2; Z=list(['%(1)','%(1)-%(2)'],['a+1','b+1']);
    evstr(Z)

### See Also

`execstr`,